package chapter10.Demo1;

import  java.sql.*;
import java.util.Scanner;

public class Demo1 {
    /**
     * 模拟添加用户业务
     */
    public static void main(String[] args) throws SQLException{
        Statement stmt = null;
        ResultSet rs =  null;
        Connection conn = null;
        try {
            // 1.注册数据库的驱动
            Class.forName("com.mysql.cj.jdbc.Driver");
            // 2.通过DriverManager获取数据库连接
            String url = "jdbc:mysql://localhost:3306/jdbc?serverTimezone=GMT%2B8&useSSL=false";
            String username = "root";//数据库账户
            String password = "jiakaiyang1";
            conn = DriverManager.getConnection(url, username, password);
            //3.通过Connection对象获取Statement对象
            stmt = conn.createStatement();
            //4.使用Statement执行SQL语句。
            /**
             * 终端用户输入用户名 密码 邮箱
             * 将终端用户的输入添加到数据库
             */
            Scanner sc = new Scanner(System.in);
            System.out.println("请输入用户姓名:");
            String un = sc.next();
            System.out.println("请输入用户密码:");
            String pd = sc.next();
            System.out.println("请输入用户邮箱:");
            String em = sc.next();
            String insertSQL = "insert into users(name,password,email) values(?,?,?)";
            PreparedStatement pm = conn.prepareStatement(insertSQL);//对插入sql进行处理了
            pm.setString(1,un);// 将SQL第一个？号绑定成un的值
            pm.setString(2,pd);// 将SQL第二个？号绑定成pd的值
            pm.setString(3,em);// 将SQL第三个？号绑定成em的值
            pm.executeUpdate();
            String sql = "select * from users";
            rs = stmt.executeQuery(sql);
            //5.操作ResultSet结果集
            System.out.println("id | name | password | email | birthday");
            while (rs.next()) {
                int id = rs.getInt("id");
                String name = rs.getString("name");
                String psw = rs.getString("password");
                String email = rs.getString("email");
                Date birthday = rs.getDate("birthday");
                System.out.println(id + "| "+ name + "| "+ psw + "|" + email + "| "+ birthday);
            }
        } catch(ClassNotFoundException e){
            e.printStackTrace();
        } finally {
            //6.回收数据库资源
            if(rs != null) {
                try {
                    rs.close();
                } catch (SQLException e) {
                    e.printStackTrace();
                }
                rs = null;
            }
            if(stmt != null) {
                try {
                    stmt.close();
                } catch (SQLException e) {
                    e.printStackTrace();
                }
                stmt = null;
            }
            if(conn != null) {
                try {
                    conn.close();
                } catch (SQLException e) {
                    e.printStackTrace();
                }
                conn = null;
            }
        }
    }
}
